29:17 hypermetropia 33:50 prism 34:23 dispersion of light 35:45 total internal reflection 41:53 rainbow formation 44:14 how a rainbow forms 50:44 scattering of light 51:42 why do sky appears blue? 55:07 why do sun appears reddish during sunrise and sunset? 56:33 why DANGER signals are usually represented by RED COLOUR? 57:31 why YELLOW COLOUR to school bus? 57:55 why do celestial body appear slightly raised from the position? 59:55 what is the reason behind 2 minutes early sunrise and 2 minutes delayed sunset? 1:02:54 why do stars twinkle but planets do not? 1:07:53 CHAPTER COMPLETED 😊 ❤------------Thank you ------------❤
5:06 human eye 5:22 part of human eye 16:48 far and near point of eye 19:07 Power of accomodation 22:28 to see far and near object 25:05 myopia 29:21 hypermetropia 32:04 advantages of eye infront of the face 33:11 prism 34:28 dispersion of light 35:45 total internal reflection 41:57 rainbow formation 49:58 why so sky appears blue? 55:05 why do sun appear more reddish during sunrise and sunset 56:39 why danger signals are usually represented by red colour 57:36 why yellow colour to school bus 57:49 why do celestial body appears slightly raised from the position? 59:51 what is the reason behind 2 minutes early sunrise and 2 minutes delayed sunset 1:02:48 why do Star twinkle but planets do not? 1:05:45 why do sun appear more reddish during sunrise and sunset Best of luck
1) I = Q/t 2) Q = ne 3) V = W/Q 4) V = IR 5) R = Rho x L/A 6)Resistance in Series: Rs = R1 + R2 + R3 7)Resistance in Parallel: 1/Rp = 1/R1 + 1/R2 + 1/R3 (» Reciprocal of R1+R2+R3) 8)H = V × Q i) H = VIt ii) H = I²Rt iii) H = V²t/R 9) P = W/t i) P = VI ii) P = I²R iii) P = V²/R 10) E = P × t S.I. Units: Current ( I ) - Ampere Charge ( Q ) - Coulomb Time ( t ) - Second Potential Difference or Voltage ( V ) - Volt Resistance ( R ) - Ohm Ω Resistivity ( Rho ) - Ohm meter Power ( P ) - Watt Heat = Energy = Work = Joule Measuring Devices: Ammeter / Milli Ammeter - for measuring current (always connected in series) Galvanometer - for measuring small/sensitive currents (we can also get the direction of the current) Voltmeter - for measuring volts (always connected in parallel) Ohm Meter - Measures the resistivity Things to remember: electron charge = (1.6 x 10⁻¹⁹ C) 1kWh= 3.6 × 10⁶J 1Ampere = 1000mA 1 Kilowaat = 1000W 1 Horse Power = 746W i hope this list will help you! ❤ ek free ka like dete jana sath please please Mera channel visit kare aur subscribe kare
Thanks Bhai lekin ye sab to electricity ke hai ☠️ but still thanks ss leke rakha hu exam se agge easy hoga sab ek jaga par likha hai maine vaise but here it is better I will write it again in another papar and put it near my table
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children😮
One concept is missing and that is presbyopia ❗ A person who is unable to see both far and near objects is suffering from presbyopia Correction -By applying bi-focal lenses consists of both concave and convex lens The upper part is concave lens The lower part is convex lens I hope that it helps 🤞🏻
📍[ The Human Eyes 👀 ] •4:49 →Chapter Start. •5:00 →Human Eye. •7:15 →Part Of Human Eye. •7:36 →Cornea. •8:28 →Crystalline Lens. •9:27 →Iris And Pupil. •11:28 →Ciliary Muscle. •12:43 →Retina. •13:32 →Optic Nerve. •13:57 →Blind Spot. •14:35 →Aqueous Humour. •16:52 →Far Point Of Eye. •17:49 →Near Point Of Human Eye. •19:08 →Power Of Accommodation. •24:42 →Myopia. •29:10 →Hypermetropia. •31:41 →Advantage Of Eyes In Front of The Face. ♪ Human Eye Topic Finished!! [📍The Colourful World 🌍] •33:07 →Prism •35:45 →Total Internal Reflection •41:52 →Rainbow Formation •47:34 →Sun Emits 7 Colour Light In Its Visible Range •49:56 →Why Do Sky Appears Blue •55:05 →Why Do Sun Appears More Reddish Sunrise And Sunset •56:28 →Why Danger Signals Are Usually Represented by Red Colour •57:28 →Why Yellow Colour To School Bus •57:46 →Why Do celestial Body Appear Slightly Raised From Their Position •59:52 →What is the Reason Behind 2 Minute Early Sunrise And 2 Minute Delayed Sunset •1:02:48 →Why Do Star Twinkle But Planet Do Not ♪ Chapter Finished ♥ Zajakallah khair ♥
56:00 During sunset, sunlight travels a long distance through the earths atmosphere. Most of the blue light is scattered. White light from which blue light has been removed looks red or yellow coloured😊😊😊
🔖 [ WHY SKY APPEARS RED DURING SUNRISE AND SUNSET!!... ] 55:50 ♥️ Red light scatters the least by the molecules present in the air. So at sunrise 🌅 and sunset 🌇, the sunlight travels a longer path through the atmosphere to reach our eyes 👀. The blue 🔵 light scatters the most and has been mostly removed ❌, leaving the red light remaining which reaches our eyes 👁️🗨️, hence it appears red 🍒. 1:05:55
Timestamps (Powered by Merlin AI) 00:07 - Understanding the human eye and the colorful world 02:20 - Science topics of 10th class will be covered in the channel 06:14 - The process of vision explained 08:25 - Description of the cornea, lens, and pupil 13:05 - The formation of images on the retina and the role of optic nerve 16:43 - The human eye has far and near points of vision 21:49 - The human eye's power of accommodation 24:43 - Explanation of myopia and its impact on vision 30:27 - Importance of using convex and concave lenses 33:12 - Dispersion of light and prism explained 37:54 - Total Internal Reflection and its conditions 40:58 - The concept of Total Internal Reflection and Rainbow Formation 47:03 - The formation of rainbow and dispersion of light 49:33 - Understanding the concept of scattering of light 55:22 - The reason behind seeing red during sunrise and sunset 57:19 - Understanding refraction of light and its effects on perception. 1:02:25 - Explanation of why planets do not twinkle but stars do 1:04:51 - Refraction and scattering of light 1:09:39 - Encouragement for hard work and dedication
A missing portion :- presbyopia Presbyopia I.) Definition :- Presbyopia is a condition in which a person is unable to see both distant and nearby objects distinctly. II.) Causes :- 1.) Gradual weakening of the ciliary muscles. 2.) Diminishing flexibility of the eye lens. III.) Correction :- It can be corrected using a bi-focal lens. A bi-focal lens is a lens consisting of both concave and convex lens. The upper part is concave while the lower part is convex.
Since blue colour has a shorter wavelength and red colour has a longer wavelength, the red colour is able to reach our eyes after the atmospheric scattering of light. Therefore, the Sun appears reddish early in the morning.
56:02 answer The sky appears redder during sunrise and sunset because sunlight travels a longer distance through the Earth's atmosphere, scattering shorter wavelengths of light away. This phenomenon is called scattering of light.The longer distance sunlight travels also scatters other longer wavelengths, like orange and yellow, which contribute to the colorful skies during sunrise and sunset. During sunrise/sunset, rays have to travel larger distances and as red light scatters least, it is capable to reach our eyes while rest of the components are scattered away. Hence, sky appears reddish orange during sunrise or sunset.🎉
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children. 57:29
55:13 Red light scatters the least by the molecules present in the air 57:42 School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour
Hlo guys . I am a student of haryana government scheme of Mission Buniyaad . I wish to everybody score 90 % + marks in 10th board exam . And only Mission Buniyaad student like this comment and reply .............😊.................. MISSION BUNIYAAD JAY HIND JAY BHARAT ..........
4:49 chapter start 5:00 human eye 7:15 parts of human eye 7:36 cornea 8:28 crystalline lens 9:27 Iris & pupil 11:28 ciliary muscle 12:43 retina 13:32 Optic nerve 13:57 blind spot 14:35 aqueous humour 16:52 far point of eye 17:49 Near point of human eye 19:08 Power of accommodation 24:42 myopia
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children.
homework questions :) 8:49 convex lens 55:55 red light is scattered least by the particles present in the air. As,it is least scattered it has to travel longer distance to reach the observer's eye hence,at the time of sunrise and sunset sky appears red. 57:39 school bus are painted yellow because yellow colour is sensitive to human eye so it can be noticed easily and therefore to drive carefully it is painted yellow. Thankyou Prashant Bhaiyya and Exphub team for amazing lectures🤍
why do yellow colour to our school bus?? School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children and others...
The video script discusses the human eye, colorful world, dispersion of light, total internal reflection, and atmospheric refraction. It explains concepts like myopia, hypermetropia, rainbow formation, and why stars twinkle but planets don't. The script also covers the phenomenon of sunrise and sunset in relation to atmospheric refraction. The audience is encouraged to practice questions and provide feedback for improvement. Key moments: 00:31 The video focuses on explaining the structure and function of the human eye, highlighting its significance in perceiving the colorful world. The presenter aims to offer high-quality education at no cost. -The video emphasizes the importance of studying the human eye and the colorful world, as it is a crucial topic in the 10th-grade science curriculum. -The presenter discusses the modern approach to teaching, focusing on conceptual understanding and application-based learning rather than rote memorization. -The script encourages viewers to subscribe to the channel to support the initiative of providing free, quality education to students. 08:07 Understanding the components of the eye such as the cornea, lens, iris, pupil, retina, optic nerve, and blind spot is crucial. Staying motivated by remembering the sacrifices of parents is essential for success. -The cornea is the outermost part inside the eye that refracts light. The lens is composed of fibers and jelly-like material, crucial for vision. -The iris controls the amount of light entering the eye, with the pupil acting as the window of the eye. The optic nerve transmits visual information to the brain. -The retina acts as a screen where images are formed, containing light-sensitive cells. The blind spot is where the optic nerve leaves the eye. -Staying motivated by remembering the sacrifices of parents is crucial for overcoming demotivation and achieving success in studies. 16:21 Understanding the power of accommodation in the eye is crucial for clear vision. Studying and working hard are emphasized for achieving success. -Explanation of far and near points in vision and the ability to see distant objects like stars. -Detailed explanation of the power of accommodation in the eye and how the lens adjusts to focus on objects at different distances. -Encouragement to work hard and put in efforts to achieve success in life and academics. 25:52 Myopia and hypermetropia are common eye conditions that can be corrected using concave and convex lenses. The dispersion of light through a prism results in the separation of white light into its component colors. -Explanation of myopia and its correction using concave lenses. -Discussion on hypermetropia and its correction using convex lenses. -Explanation of the dispersion of light through a prism and the phenomenon of Dispersion of Light. 34:57 Understanding light dispersion and Total Internal Reflection is essential for optics. Dispersion explains light splitting into colors, while TIR involves light reflection within a medium. -Dispersion of light. Light splits into colors due to different bending abilities. Understanding dispersion is crucial in optics. -Total Internal Reflection (TIR). Light reflects within a medium at an angle greater than the critical angle. TIR is vital in optics and signal transmission. -Optical fiber example. TIR occurs in optical fibers, enabling signal transmission. Understanding TIR is important for practical applications like Wi-Fi cables. -Rainbow formation. Exploring how rainbows form without prisms, involving dispersion and TIR. Understanding the science behind rainbows is fascinating and educational. 44:19 Sunlight refracts and disperses into seven colors forming a rainbow due to rain, while scattering of light by small particles in the air causes the blue color of the sky and yellow color of sunlight. -Explanation of rainbow formation due to refraction and dispersion of sunlight after rain. -Description of how scattering of light by small particles in the air leads to the blue color of the sky and yellow color of sunlight. 54:28 Understanding atmospheric refraction is crucial to explain why celestial bodies appear slightly raised from their actual positions. The color red is used for stop signs and school buses due to the maximum wavelength of red light. -Reasons behind using red color for stop signs and school buses. -Explanation of why celestial bodies appear raised due to atmospheric refraction. 1:02:20 Refraction causes stars to twinkle due to their distance, while planets appear steady. Light scattering increases with distance, leading to twinkling. Red light scatters less than blue light. -Explanation of why stars twinkle but planets don't due to distance. Stars are far away, causing more refraction and light scattering. -Discussion on how light scattering increases with distance, leading to twinkling. Red light scatters less than blue light.
57:44 School buses are yellow because the color is highly visible and easily noticeable in various lighting and weather conditions, making it safer for children. Here are the main reasons: 1. High Visibility: Yellow is more visible than other colors, especially in peripheral vision. This makes it easier for drivers to spot a school bus from a distance or in their side vision. 2. Contrast: Yellow contrasts well with the black lettering used for signs and bus numbers, making it easy to read from afar. 3. Attention-Grabbing: The color is naturally attention-grabbing, which alerts other drivers to stop when the bus is picking up or dropping off students. 4. Low-Light Conditions: Yellow is easier to see during dawn, dusk, or foggy weather compared to other colors. The use of yellow for school buses was standardized in 1939 at a conference led by Dr. Frank Cyr, known as the "Father of the Yellow School Bus," to enhance the safety of school transportation.
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children. Thats the answer!
57:29 Ans - School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children.
55:46 Ans - While sunset and sunrise, the colour of the sun and its surrounding appear red. During sunset and sunrise, the sun is near horizon and therefore the sunlight has to travel larger distance in atmosphere. Due to this most of the blue light (shorter wavelength) are scattered away by the particles. The light of longer wavelength (red colour) will reach our eye. This is why sun appear red in colour.
55:53 During Sunrise and Sunset,The Sun is near the horizon and it's light has to travel longer distances to reach in our eyes and the lights of longer wavelength scatters the least but lights like blue,violet and indigo gets scattered and only red,orange light enters our eye and the sky looks reddish during sunrise and sunset
why sky appears red during sunrise and sunset - 55:55 Red light scatters the least by the molecules present in the air. So at sunrise and sunset, the sunlight travels a longer path through the atmosphere to reach our eyes. The blue light scatters the most and has been mostly removed, leaving the red light remaining which reaches our eyes, hence it appears red.
56:08 Because the sun distance during sunrise in very large so, Higher wavelength light like "Red'' passes only through particles .. So sun look reddish in colour.
The school bus are painted in yellow 🟡 colour because... Our eyes mostly are sensetive yellow ( not 🚫 red and violet because it's least scattering) so that yellow 💛 is used to paint bus 🚌 and it also helps other drivers to notice and drive with protection because of presence of children in the bus Thoda lamba ho gya sorry 🤕🤕😐 Thanku Prashant bhaiya 🔥🔥🔥🔥 Josh 100/100 💣💣💣💥💥🔥🔥
Not red and viplot cuz its least scattering??? Violet is most scattering* plus shouldnt we paint it red since its least scattering and people and recognize a school bus right away from far.
55:59 During sunrise and sunset, light have to travel longer distance to reach observer. Loss of energy due to scattering is more for high frequency wave. Longer wavelength wave has minimum loss due scattering, and can travel long distance. Red color has longer wavelength, its intensity reach to the observer is more compare to other colors. Hence the sun appears red during sunrise and sunset.
55:55 The atmosphere appears more reddish during sunrise and sunset because the Sun's light travels a longer path through the atmosphere, scattering the shorter blue wavelengths out of our line of sight and leaving the longer red wavelengths, which dominate the light reaching our eyes. But during day time the sky appears white/blue as when sun is high at the sky because the blue light having short wavelength are scattered throughout the sky ( Rayleigh Scattering phenomenon)
Answer :- at sunset and sunrise the sun's position gets down and due to this highest wave length colour is visible that is red and orange . That's why we aren't able to see things clearly because red and orange colour scatter least . @Exphub9thand10th #Exphub
00:07 Understanding the human eye and the colorful world 02:20 Science topics of 10th class will be covered in the channel 06:14 The process of vision explained 08:25 Description of the cornea, lens, and pupil 13:05 The formation of images on the retina and the role of optic nerve 16:43 The human eye has far and near points of vision 21:49 The human eye's power of accommodation 24:43 Explanation of myopia and its impact on vision 30:27 Importance of using convex and concave lenses 33:12 Dispersion of light and prism explained 37:54 Total Internal Reflection and its conditions 40:58 The concept of Total Internal Reflection and Rainbow Formation 47:03 The formation of rainbow and dispersion of light 49:33 Understanding the concept of scattering of light 55:22 The reason behind seeing red during sunrise and sunset 57:19 Understanding refraction of light and its effects on perception. 1:02:25 Explanation of why planets do not twinkle but stars do 1:04:51 Refraction and scattering of light 1:09:39 Encouragement for hard work and dedication
Red light scatters the least by the molecules present in the air. So at sunrise and sunset, the sunlight travels a longer. path through the atmosphere to reach our eyes. The blue light scatters the most and has been mostly removed, leaving the red light remaining which reaches our eyes, hence it appears red.
(The Human Eyes 👀) 4:49। Chapter start 5: 00 Human Eye 7:15 parts of human eye 7:36 Cornea 8:28 Crystalline lens 9:27 Iris and Pupil 11:28 Ciliary Muscle 12:43 Ratina (Thank you sir ❤😂
57:37 The yellow color for school buses was chosen for its visibility and safety. Yellow is highly visible in various lighting conditions and stands out against many backgrounds, making it easier for other drivers to see and recognize the bus, especially in poor weather or low light conditions. This high visibility helps reduce the risk of accidents involving school buses and enhances the safety of students as they enter or exit the bus.
50:37 The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. There are more effective in scattering light of shorter wavelengths at the blue and than light of longer wavelengths at the red end. When the sunlight passes through the atmosphere the fine particles in air scatter the blue light strongly than the red light. The scattered blue light enters into our eyes and it makes the colour of the sky look blue
Q) why school colour to school bus ? Ans). Our eyes are most sensitive to yellow colors and are least sensitive to violet and red colors. Due to this reason school buses are painted yellow. As a result, the school buses can be easily identified by other drivers and a safe distance can be maintained to ensure the safety of children. Q) why danger signals are usually represented by red colour? Ans). Since the colour red has the highest wavelength of all the colours it gets scattered the least. So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc. without being scattered or faded away.
2024 25 students attentions here 😂 guys do your best for your parents and also for teachers!! Never ever break their trust 🌼✨👍this is best exam of my life in 2025🎉🌟🌟
Jo jo bhi ye video dekh ke thorda bhi samje wo like maro Aur 10 mai sab sab all the students of 10 class will pass 😊😊 { Those who like this comment will pass in 10 class ❤
Q . Why do sun appear more reddish during sunrise and sunset? Ans : Red and yellow light from the sun cannot be scattered by the tiny atmospheric particles. When sunlight passes over a greater distance, the blue light scatters more due to short wavelength . As a result, yellow ànd red light appears during sunrise and sunset as they longer wavelength. I hope it helps 😊.
When a white light (from sun) enters the earth's atmosphere, it gets scattered away due to the atmospheric particles. Since, blue colour has the minimum wavelength, so blue colour scatters the most and thus the sky appears blue
Q. Why bus yellow colour to school bus ? ANS. The use of yellow for school buses is primarily for safety reason.. yellow is highly visible, especially in the early morning or late afternoon when children are travelling to and from school. It help other drivers quickly identify the bus and take caution . 😊
56:01 Ans-Red light scatters the least by the molecules present in the air. So at sunrise and sunset, the sunlight travels a longer path through the atmosphere to reach our eyes. The blue light scatters the most and has been mostly removed, leaving the red light remaining which reaches our eyes, hence it appears red. PIN TO BANTA HAI 😍😍
5:06 human eye 5:22 part of human eye 16:48 far and near point of eye 19:07 Power of accomodation 22:28 to see far and near object 25:05 myopia 29:21 hypermetropia 32:04 advantages of eye infront of the face 33:11 prism 34:28 dispersion of light 35:45 total internal reflection 41:57 rainbow formation 49:58 why so sky appears blue? 55:05 why do sun appear more reddish during sunrise and sunset 56:39 why danger signals are usually represented by red colour 57:36 why yellow colour to school bus 57:49 why do celestial body appears slightly raised from the position? 59:51 what is the reason behind 2 minutes early sunrise and 2 minutes delayed sunset 1:02:48 why do Star twinkle but planets do not? 1:05:45 why do sun appear more reddish during sunrise and sunset
The white light coming from sun passes through thick layers of air and covers a larger distance in the earth's atmosphere before reaching to the observer. During this more scattering of blue light and shorter wavelengths take place . Hence, the red light reaches to the observer and sky appears reddish.
As our eyes are mostly sensitive to yellow colour. So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of childern.
Advanced sunrise and delayed sunset are phenomena caused due to atmospheric refraction. In this the Sun appears to rise early by 2 minutes and set late by 2 minutes. When the rays from the Sun hit the atmosphere they get refracted. 1:00:03
56:00 During sunset and sunrise, sunlight travels through more of the atmosphere, which scatters away the shorter wavelengths of light, leaving mostly red light to reach our eyes: Explanation Light wavelengths Sunlight is made up of seven colors, with red having the longest wavelength and violet having the shortest. Atmospheric particles When the sun is close to the horizon, its light must travel through more of the atmosphere to reach our eyes. Light scattering Atmospheric particles scatter light, and shorter wavelengths like blue are scattered more than longer wavelengths like red. Red light remaining Because blue light is scattered away, mostly red light remains to reach our eyes, making the sun appear red.
44:37 Total internal reflection does not play a role in the formation of a rainbow. Instead, the formation of a rainbow involves a combination of refraction, dispersion, and reflection.
Sun appears reddish during sunrise or sunset due to the scattering of light . Actually at the time of sunrise and sunset the sun is far away from us then the light from the sun have travel more distance and since more distance travelling therefore more scattering of light. Hence colour of sun is reddish during sunrise and sunset 55:06
Ques:- why do sun appears more reddish during sunrise and sunset? Ans:- The reason why the Sun appears reddish during sunrise and sunset is because of the scattering of light in the Earth's atmosphere. The atmosphere of Earth contains, oxygen, carbon dioxide etc.,when the sunlight first and last reaches Earth, it posses through these molecules. They absorb different wavelengths, but the most scattered wavelength is blue because of its shorter wavelength (~450nm). Like please ❤😊
Why do sun appear more reddish during sunrise and sunset? Ans= The sun appears more reddish during sunrise and sunset due to the phenomenon known as Rayleigh scattering. As the sun is low on the horizon, its light has to pass through a larger portion of the Earth's atmosphere compared to when it's overhead. This longer path length scatters shorter wavelengths of light (blue and violet) more than longer wavelengths (red and orange). As a result, the light that reaches our eyes directly is more dominated by these longer wavelengths, giving the sun a reddish or orange hue.
Since the color red has the highest wavelength of all colours it gets scattered the least. So red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.
24:49 par bhaiya se mistake hoo gai hai Sab log sahi krke likh lena Bhaiya ne galti se contracted muscles ki Jagah relaxed likh dia or relaxed muscles jagah contracted muscles I hope it helps 😁
School buses are painted yellow because of the following reasons: •Visibility: Yellow is one of the most visible colors to the human eye, and people can see it better than red in their peripheral vision. •Low light: Yellow is easier to see in low light than red.
21:19 definition of power of accomodation in more easy words:- ( it's the ability of ciliary muscle to adjust focal length of the eye lens to form clear and complete image of various objects ) is it helpful 😅
As red light is least scattered by the particles and when the sun rises, the first light in VIBGYOR is RED and hence it reaches our eyes directly. Then the light changes to ORANGE and then YELLOW. The same phenomena in reverse occurs while the sun is going to set.
Q.why bus yellow colour to school bus? Ans-The use of yellow for school buses is primarily for safety reasons. Yellow is highly visible, especially in the early morning or late afternoon when children are traveling to and from school. It helps other drivers quickly identify the bus and take caution.❤❤
57:34 why yellow colour to school bus? Ans- yellow colour can also be spotted even in the rain, fog and dew. Since the lateral peripheral vision of yellow is 1.24 times greater than the red colour, it is more visible than the red itself.
Q.why do sun appear more reddish during sunrise and sunset? Ans..At the time of sunrise or sunset the position of the sun is very far away from us. The sunlight travels longer distance through the atmosphere of the earth before reaching our eyes scattering of blue light is more than the scattering of red light. As a result of this more red lights reaches our eyes than any other colour hence sunset and sunrise appears red
I wish mera comment jitne bhe log padh rahe hai woo log 98% board mein score kare
Phir toh zindagi bhar yahi padunga book nahi
@@Ritesh_singh574😂😂
@@Ritesh_singh574😂😂😂😂
@@Ritesh_singh574 ☻️
Apke muh me ghee shakar ❤😊
Same to you 🤧😌
29:17 hypermetropia
33:50 prism
34:23 dispersion of light
35:45 total internal reflection
41:53 rainbow formation
44:14 how a rainbow forms
50:44 scattering of light
51:42 why do sky appears blue?
55:07 why do sun appears reddish during sunrise and sunset?
56:33 why DANGER signals are usually represented by RED COLOUR?
57:31 why YELLOW COLOUR to school bus?
57:55 why do celestial body appear slightly raised from the position?
59:55 what is the reason behind 2 minutes early sunrise and 2 minutes delayed sunset?
1:02:54 why do stars twinkle but planets do not?
1:07:53 CHAPTER COMPLETED 😊
❤------------Thank you ------------❤
Bhai internal reflection total internal reflection nahi...
Hi
@@pushpasharma65 Hello Bro .... Kaisi ho rhi hai tyaari fir exam ki 😅
@@JustPadhle-cp2nthey did u finish ur science syllabus?😿
@@Soreal-s7o No... Chemistry Rehti hai 😢🥺
5:06 human eye
5:22 part of human eye
16:48 far and near point of eye
19:07 Power of accomodation
22:28 to see far and near object
25:05 myopia
29:21 hypermetropia
32:04 advantages of eye infront of the face
33:11 prism
34:28 dispersion of light
35:45 total internal reflection
41:57 rainbow formation
49:58 why so sky appears blue?
55:05 why do sun appear more reddish during sunrise and sunset
56:39 why danger signals are usually represented by red colour
57:36 why yellow colour to school bus
57:49 why do celestial body appears slightly raised from the position?
59:51 what is the reason behind 2 minutes early sunrise and 2 minutes delayed sunset
1:02:48 why do Star twinkle but planets do not?
1:05:45 why do sun appear more reddish during sunrise and sunset
Best of luck
youtube.com/@rudrapujara7800?feature=shared
youtube.com/@rudrapujara7800?feature=shared
hiii
@@jasveer51 bhai milgyaa..reply💀
@@prithvipratap... no
1) I = Q/t
2) Q = ne
3) V = W/Q
4) V = IR
5) R = Rho x L/A
6)Resistance in Series: Rs = R1 + R2 + R3
7)Resistance in Parallel: 1/Rp = 1/R1 + 1/R2 + 1/R3 (» Reciprocal of R1+R2+R3)
8)H = V × Q
i) H = VIt
ii) H = I²Rt
iii) H = V²t/R
9) P = W/t
i) P = VI
ii) P = I²R
iii) P = V²/R
10) E = P × t
S.I. Units:
Current ( I ) - Ampere
Charge ( Q ) - Coulomb
Time ( t ) - Second
Potential Difference or Voltage ( V ) - Volt
Resistance ( R ) - Ohm Ω
Resistivity ( Rho ) - Ohm meter
Power ( P ) - Watt
Heat = Energy = Work = Joule
Measuring Devices:
Ammeter / Milli Ammeter - for measuring current (always connected in series)
Galvanometer - for measuring small/sensitive currents (we can also get the direction of the current)
Voltmeter - for measuring volts (always connected in parallel)
Ohm Meter - Measures the resistivity
Things to remember:
electron charge = (1.6 x 10⁻¹⁹ C)
1kWh= 3.6 × 10⁶J
1Ampere = 1000mA
1 Kilowaat = 1000W
1 Horse Power = 746W
i hope this list will help you! ❤
ek free ka like dete jana sath please please Mera channel visit kare aur subscribe kare
Nice to see
I appreciate your efforts
47:24
tu to dev manus nikla re
Thanks Bhai lekin ye sab to electricity ke hai ☠️ but still thanks ss leke rakha hu exam se agge easy hoga sab ek jaga par likha hai maine vaise but here it is better I will write it again in another papar and put it near my table
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children😮
Help by Google
So wht@@AyanAnsari-p7r
Bhai blue colour bhi sensitive hoti hai
Ekdum google ka chap diye 😂
chaap diya google ka
One concept is missing and that is presbyopia ❗
A person who is unable to see both far and near objects is suffering from presbyopia
Correction -By applying bi-focal lenses consists of both concave and convex lens
The upper part is concave lens
The lower part is convex lens
I hope that it helps 🤞🏻
Thnxx
Upper part is concave lens and lower is convex lens : correction
. Thank you
Thnxx
@@homieesingh9198 abhi dekh rhe ho 😂 lekin me bhi abhi hi dekh rha hu 😢
📍[ The Human Eyes 👀 ]
•4:49 →Chapter Start.
•5:00 →Human Eye.
•7:15 →Part Of Human Eye.
•7:36 →Cornea.
•8:28 →Crystalline Lens.
•9:27 →Iris And Pupil.
•11:28 →Ciliary Muscle.
•12:43 →Retina.
•13:32 →Optic Nerve.
•13:57 →Blind Spot.
•14:35 →Aqueous Humour.
•16:52 →Far Point Of Eye.
•17:49 →Near Point Of Human Eye.
•19:08 →Power Of Accommodation.
•24:42 →Myopia.
•29:10 →Hypermetropia.
•31:41 →Advantage Of Eyes In Front of The Face.
♪ Human Eye Topic Finished!!
[📍The Colourful World 🌍]
•33:07 →Prism
•35:45 →Total Internal Reflection
•41:52 →Rainbow Formation
•47:34 →Sun Emits 7 Colour Light In Its Visible Range
•49:56 →Why Do Sky Appears Blue
•55:05 →Why Do Sun Appears More Reddish Sunrise And Sunset
•56:28 →Why Danger Signals Are Usually Represented by Red Colour
•57:28 →Why Yellow Colour To School Bus
•57:46 →Why Do celestial Body Appear Slightly Raised From Their Position
•59:52 →What is the Reason Behind 2 Minute Early Sunrise And 2 Minute Delayed Sunset
•1:02:48 →Why Do Star Twinkle But Planet Do Not
♪ Chapter Finished
♥ Zajakallah khair ♥
jai shree ram bhai and tq
Thanks bro
Ya
@@_.aryann14._Allah hu Akbar......
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1:02:18
Physics in theory ❤️🗿
Physics in numerical 💀
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bhai teri pfp dekh ke mujhe julaab ho gya h
56:00
During sunset, sunlight travels a long distance through the earths atmosphere. Most of the blue light is scattered. White light from which blue light has been removed looks red or yellow coloured😊😊😊
❤❤
Thank you bhai
Thanks 🙏❤
Thank you bhaiya ❤❤❤
Bhai school bus vala bhi bata de
🔖 [ WHY SKY APPEARS RED DURING SUNRISE AND SUNSET!!... ] 55:50
♥️ Red light scatters the least by the molecules present in the air. So at sunrise 🌅 and sunset 🌇, the sunlight travels a longer path through the atmosphere to reach our eyes 👀. The blue 🔵 light scatters the most and has been mostly removed ❌, leaving the red light remaining which reaches our eyes 👁️🗨️, hence it appears red 🍒. 1:05:55
Thanks
thanks bro.
Who is Watching in Nov-Dec 2024 😅
All the Best For Boards ....
Datesheet to aa gayi😢 ...
Timestamps (Powered by Merlin AI)
00:07 - Understanding the human eye and the colorful world
02:20 - Science topics of 10th class will be covered in the channel
06:14 - The process of vision explained
08:25 - Description of the cornea, lens, and pupil
13:05 - The formation of images on the retina and the role of optic nerve
16:43 - The human eye has far and near points of vision
21:49 - The human eye's power of accommodation
24:43 - Explanation of myopia and its impact on vision
30:27 - Importance of using convex and concave lenses
33:12 - Dispersion of light and prism explained
37:54 - Total Internal Reflection and its conditions
40:58 - The concept of Total Internal Reflection and Rainbow Formation
47:03 - The formation of rainbow and dispersion of light
49:33 - Understanding the concept of scattering of light
55:22 - The reason behind seeing red during sunrise and sunset
57:19 - Understanding refraction of light and its effects on perception.
1:02:25 - Explanation of why planets do not twinkle but stars do
1:04:51 - Refraction and scattering of light
1:09:39 - Encouragement for hard work and dedication
May all students get 95 percentage above in board exams ❤❤👍👍❤️❤️❤️❤️ all the best 👍👍🙂🙏
Aree thanku so much ❤
I will bro 😊
Thanks you ❤❤
apki bat sach ho jaye bhai
Thank you ❤
A missing portion :- presbyopia
Presbyopia
I.) Definition :- Presbyopia is a condition in which a person is unable to see both distant and nearby objects distinctly.
II.) Causes :- 1.) Gradual weakening of the ciliary muscles.
2.) Diminishing flexibility of the eye lens.
III.) Correction :- It can be corrected using a bi-focal lens.
A bi-focal lens is a lens consisting of both concave and convex lens.
The upper part is concave while the lower part is convex.
Since blue colour has a shorter wavelength and red colour has a longer wavelength, the red colour is able to reach our eyes after the atmospheric scattering of light. Therefore, the Sun appears reddish early in the morning.
Kr liya google😂
Thanks bro
good job bro
Jalna ki bu arahiha 💀@@MiraDas-j2m
But bhai particle of atmosphere is very small
56:02 answer
The sky appears redder during sunrise and sunset because sunlight travels a longer distance through the Earth's atmosphere, scattering shorter wavelengths of light away. This phenomenon is called scattering of light.The longer distance sunlight travels also scatters other longer wavelengths, like orange and yellow, which contribute to the colorful skies during sunrise and sunset.
During sunrise/sunset, rays have to travel larger distances and as red light scatters least, it is capable to reach our eyes while rest of the components are scattered away. Hence, sky appears reddish orange during sunrise or sunset.🎉
😊
Waooh🎉
Chaap dia na Google se .dikha di na apni aukat
@@dangereousboy1252 aloo chaap bhindi chaap then what's Google chaap 🤣😂🤣
@@MagicalGamerOfficial don't be shy . You copied this answer from Google and then pasted here
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children. 57:29
Thanx for answer
@@VaishnaviPandey-u9i it's ok
Brother na Google sa copy keya😂
😂
@@seerathussain9679boards 2024 ?
55:13 Red light scatters the least by the molecules present in the air
57:42 School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour
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JAY HIND JAY BHARAT ..........
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you also in 10th
4:49 chapter start
5:00 human eye
7:15 parts of human eye
7:36 cornea
8:28 crystalline lens
9:27 Iris & pupil
11:28 ciliary muscle
12:43 retina
13:32 Optic nerve
13:57 blind spot
14:35 aqueous humour
16:52 far point of eye
17:49 Near point of human eye
19:08 Power of accommodation
24:42 myopia
Bhai ya mat Kara Karo watch time kharab ho jata hai
@@i.m.avatar971apko kyu problem ho rahi h?
@@kanii8929 ho rahi hai bas
@@i.m.avatar971 are you brother of this teacher that you thinking about watch time 😂😂😂
@@niskff2777 no i think because I also have yt channel
Finally 1:08:42 completed this chapter.. 😊😊 At 12:15 in night... Josh 100% .. Thank u sir 🌹❤
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11:45 night time complete 💯💯
Bro subah ke 4 Baje shuru kar raha😢
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@@basheermohiuddin7181i also
@@basheermohiuddin7181 mere jaisa hai bhai tu bhi
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children.
homework questions :)
8:49 convex lens
55:55 red light is scattered least by the particles present in the air. As,it is least scattered it has to travel longer distance to reach the observer's eye hence,at the time of sunrise and sunset sky appears red.
57:39 school bus are painted yellow because yellow colour is sensitive to human eye so it can be noticed easily and therefore to drive carefully it is painted yellow.
Thankyou Prashant Bhaiyya and Exphub team for amazing lectures🤍
why do yellow colour to our school bus??
School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children and others...
Yess😂
because the yellow color is most attractive to see and the also for safety measures
we also see this color in many govt. vehicles
pura google se chapa hai
@@Justwhy-x3o nhi bhai mujhe pta tha main oadha tha pehle
😮💨😮💨
@@AnshDixit-gi4pi but mene toh study me ko bola tha not you
The video script discusses the human eye, colorful world, dispersion of light, total internal reflection, and atmospheric refraction. It explains concepts like myopia, hypermetropia, rainbow formation, and why stars twinkle but planets don't. The script also covers the phenomenon of sunrise and sunset in relation to atmospheric refraction. The audience is encouraged to practice questions and provide feedback for improvement.
Key moments:
00:31 The video focuses on explaining the structure and function of the human eye, highlighting its significance in perceiving the colorful world. The presenter aims to offer high-quality education at no cost.
-The video emphasizes the importance of studying the human eye and the colorful world, as it is a crucial topic in the 10th-grade science curriculum.
-The presenter discusses the modern approach to teaching, focusing on conceptual understanding and application-based learning rather than rote memorization.
-The script encourages viewers to subscribe to the channel to support the initiative of providing free, quality education to students.
08:07 Understanding the components of the eye such as the cornea, lens, iris, pupil, retina, optic nerve, and blind spot is crucial. Staying motivated by remembering the sacrifices of parents is essential for success.
-The cornea is the outermost part inside the eye that refracts light. The lens is composed of fibers and jelly-like material, crucial for vision.
-The iris controls the amount of light entering the eye, with the pupil acting as the window of the eye. The optic nerve transmits visual information to the brain.
-The retina acts as a screen where images are formed, containing light-sensitive cells. The blind spot is where the optic nerve leaves the eye.
-Staying motivated by remembering the sacrifices of parents is crucial for overcoming demotivation and achieving success in studies.
16:21 Understanding the power of accommodation in the eye is crucial for clear vision. Studying and working hard are emphasized for achieving success.
-Explanation of far and near points in vision and the ability to see distant objects like stars.
-Detailed explanation of the power of accommodation in the eye and how the lens adjusts to focus on objects at different distances.
-Encouragement to work hard and put in efforts to achieve success in life and academics.
25:52 Myopia and hypermetropia are common eye conditions that can be corrected using concave and convex lenses. The dispersion of light through a prism results in the separation of white light into its component colors.
-Explanation of myopia and its correction using concave lenses.
-Discussion on hypermetropia and its correction using convex lenses.
-Explanation of the dispersion of light through a prism and the phenomenon of Dispersion of Light.
34:57 Understanding light dispersion and Total Internal Reflection is essential for optics. Dispersion explains light splitting into colors, while TIR involves light reflection within a medium.
-Dispersion of light. Light splits into colors due to different bending abilities. Understanding dispersion is crucial in optics.
-Total Internal Reflection (TIR). Light reflects within a medium at an angle greater than the critical angle. TIR is vital in optics and signal transmission.
-Optical fiber example. TIR occurs in optical fibers, enabling signal transmission. Understanding TIR is important for practical applications like Wi-Fi cables.
-Rainbow formation. Exploring how rainbows form without prisms, involving dispersion and TIR. Understanding the science behind rainbows is fascinating and educational.
44:19 Sunlight refracts and disperses into seven colors forming a rainbow due to rain, while scattering of light by small particles in the air causes the blue color of the sky and yellow color of sunlight.
-Explanation of rainbow formation due to refraction and dispersion of sunlight after rain.
-Description of how scattering of light by small particles in the air leads to the blue color of the sky and yellow color of sunlight.
54:28 Understanding atmospheric refraction is crucial to explain why celestial bodies appear slightly raised from their actual positions. The color red is used for stop signs and school buses due to the maximum wavelength of red light.
-Reasons behind using red color for stop signs and school buses.
-Explanation of why celestial bodies appear raised due to atmospheric refraction.
1:02:20 Refraction causes stars to twinkle due to their distance, while planets appear steady. Light scattering increases with distance, leading to twinkling. Red light scatters less than blue light.
-Explanation of why stars twinkle but planets don't due to distance. Stars are far away, causing more refraction and light scattering.
-Discussion on how light scattering increases with distance, leading to twinkling. Red light scatters less than blue light.
wonderful summary, thank you!
57:44 School buses are yellow because the color is highly visible and easily noticeable in various lighting and weather conditions, making it safer for children. Here are the main reasons:
1. High Visibility: Yellow is more visible than other colors, especially in peripheral vision. This makes it easier for drivers to spot a school bus from a distance or in their side vision.
2. Contrast: Yellow contrasts well with the black lettering used for signs and bus numbers, making it easy to read from afar.
3. Attention-Grabbing: The color is naturally attention-grabbing, which alerts other drivers to stop when the bus is picking up or dropping off students.
4. Low-Light Conditions: Yellow is easier to see during dawn, dusk, or foggy weather compared to other colors.
The use of yellow for school buses was standardized in 1939 at a conference led by Dr. Frank Cyr, known as the "Father of the Yellow School Bus," to enhance the safety of school transportation.
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School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children. Thats the answer!
koi google se copied nhi bolega
57:36
@@amusementcafe7890koi bhi nhi😅
❤ chapter Complete 💯 josh on 🔝
Bhai lakin vo bhi to vahi log karte hai jinhe Question ke answers janne ki iccha ho........ 🙂😎
57:29 Ans - School buses are painted with yellow colour because our eyes are mostly sensitive to yellow colour (and are least sensitive for violet and red colours). So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of children.
2025- board waleeee like thokooo or 95+% lane ka
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Edit= wow so many likes❤
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Wsp
Rainbow is the combined effect of
1) refraction
2) dispersion
3)Total internal reflection
3opition correct
1:00:04 Due to refraction of light atmospheric ( horizon , apparent , sunset , real ) 🌄 .
55:46 Ans - While sunset and sunrise, the colour of the sun and its surrounding appear red. During sunset and sunrise, the sun is near horizon and therefore the sunlight has to travel larger distance in atmosphere. Due to this most of the blue light (shorter wavelength) are scattered away by the particles. The light of longer wavelength (red colour) will reach our eye. This is why sun appear red in colour.
55:53
During Sunrise and Sunset,The Sun is near the horizon and it's light has to travel longer distances to reach in our eyes and the lights of longer wavelength scatters the least but lights like blue,violet and indigo gets scattered and only red,orange light enters our eye and the sky looks reddish during sunrise and sunset
Thanks bro 😊
Thanks bro 😊
Hiii
thank you bro of sisu who ever u r because my ID is also on my father's name 😂
Thanks bro you help your junior
why sky appears red during sunrise and sunset - 55:55
Red light scatters the least by the molecules present in the air. So at sunrise and sunset, the sunlight travels a longer path through the atmosphere to reach our eyes. The blue light scatters the most and has been mostly removed, leaving the red light remaining which reaches our eyes, hence it appears red.
2024-25 ke ho kay
@@IbrahimDoddamani-cc1kt yep
56:08 Because the sun distance during sunrise in very large so, Higher wavelength light like "Red'' passes only through particles .. So sun look reddish in colour.
The school bus are painted in yellow 🟡 colour because... Our eyes mostly are sensetive yellow ( not 🚫 red and violet because it's least scattering) so that yellow 💛 is used to paint bus 🚌 and it also helps other drivers to notice and drive with protection because of presence of children in the bus
Thoda lamba ho gya sorry 🤕🤕😐
Thanku Prashant bhaiya 🔥🔥🔥🔥
Josh 100/100 💣💣💣💥💥🔥🔥
@@rnewaalabhai Jaru nahi hai sab ka google se ho ..
But hai bhi to itne logo ne seek liya hai inse .....
@@upsc0089 Sahi pakde hai😂😂
Bro tere jaise 4-5 ke answer he google se chapp liya
Not red and viplot cuz its least scattering??? Violet is most scattering* plus shouldnt we paint it red since its least scattering and people and recognize a school bus right away from far.
Byjus op😂😂
Class........10 academic year 2024-2025 ... attendance please 😂😂
Me broo 😂😂
Me 😂😂
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@@Badmasaditya552 I am a girl yaar...
1:07:57 Finally Completed this chapter at 1:28am 😊😊
Thank you sir 🙏🏻
Ww😮
Iam at 3:11 am😂
57:44 because yellow colour is very. Sensitivity to your eyes
55:59 During sunrise and sunset, light have to travel longer distance to reach observer. Loss of energy due to scattering is more for high frequency wave. Longer wavelength wave has minimum loss due scattering, and can travel long distance. Red color has longer wavelength, its intensity reach to the observer is more compare to other colors. Hence the sun appears red during sunrise and sunset.
Prashant bhaiya pin krna bhool gye
😂@@Papa_aalu
This topic is deleted right
No
Nice explaination Bro
55:55 The atmosphere appears more reddish during sunrise and sunset because the Sun's light travels a longer path through the atmosphere, scattering the shorter blue wavelengths out of our line of sight and leaving the longer red wavelengths, which dominate the light reaching our eyes.
But during day time the sky appears white/blue as when sun is high at the sky because the blue light having short wavelength are scattered throughout the sky
( Rayleigh Scattering phenomenon)
Answer :- at sunset and sunrise the sun's position gets down and due to this highest wave length colour is visible that is red and orange . That's why we aren't able to see things clearly because red and orange colour scatter least . @Exphub9thand10th #Exphub
Hi
u are definitely that one topper in the whole class
@@mrfrost2151And,we are definitely that legends who came here to complete our syllabus😂.
First later always capital
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Who are all watching for half yearly exams
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Level 1 humor
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And I'm studying insted of revising..
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Yes😂😅
Jo mera comment like krega uska board ma 99.5% ayanga confirm ❤❤
00:07 Understanding the human eye and the colorful world
02:20 Science topics of 10th class will be covered in the channel
06:14 The process of vision explained
08:25 Description of the cornea, lens, and pupil
13:05 The formation of images on the retina and the role of optic nerve
16:43 The human eye has far and near points of vision
21:49 The human eye's power of accommodation
24:43 Explanation of myopia and its impact on vision
30:27 Importance of using convex and concave lenses
33:12 Dispersion of light and prism explained
37:54 Total Internal Reflection and its conditions
40:58 The concept of Total Internal Reflection and Rainbow Formation
47:03 The formation of rainbow and dispersion of light
49:33 Understanding the concept of scattering of light
55:22 The reason behind seeing red during sunrise and sunset
57:19 Understanding refraction of light and its effects on perception.
1:02:25 Explanation of why planets do not twinkle but stars do
1:04:51 Refraction and scattering of light
1:09:39 Encouragement for hard work and dedication
Thank you
Kitna khaali hai bhai
Thankyou ❤.
Red light scatters the least by the molecules present in the air. So at sunrise and sunset, the sunlight travels a longer. path through the atmosphere to reach our eyes. The blue light scatters the most and has been mostly removed, leaving the red light remaining which reaches our eyes, hence it appears red.
haa tu sahi kaha rhi hai
(The Human Eyes 👀)
4:49। Chapter start
5: 00 Human Eye
7:15 parts of human eye
7:36 Cornea
8:28 Crystalline lens
9:27 Iris and Pupil
11:28 Ciliary Muscle
12:43 Ratina
(Thank you sir ❤😂
Thank you who are you
Ratina ni retina
What type of lens is used in the spectacles which don't have any test or are worn for fashion and all that stuff?
57:37 The yellow color for school buses was chosen for its visibility and safety. Yellow is highly visible in various lighting conditions and stands out against many backgrounds, making it easier for other drivers to see and recognize the bus, especially in poor weather or low light conditions. This high visibility helps reduce the risk of accidents involving school buses and enhances the safety of students as they enter or exit the bus.
👍👍👍👍👍
is that why the first highlighter has fluorescent yellow colour ?
50:37 The molecules of air and other fine particles in the atmosphere have size smaller than the wavelength of visible light. There are more effective in scattering light of shorter wavelengths at the blue and than light of longer wavelengths at the red end. When the sunlight passes through the atmosphere the fine particles in air scatter the blue light strongly than the red light. The scattered blue light enters into our eyes and it makes the colour of the sky look blue
Yes it is right 🙂
thanks for sending 👍👍👍
Q) why school colour to school bus ?
Ans). Our eyes are most sensitive to yellow colors and are least sensitive to violet and red colors. Due to this reason school buses are painted yellow. As a result, the school buses can be easily identified by other drivers and a safe distance can be maintained to ensure the safety of children.
Q) why danger signals are usually represented by red colour?
Ans). Since the colour red has the highest wavelength of all the colours it gets scattered the least. So, red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc. without being scattered or faded away.
😊
good 👍>>>>from byjus🙂💀
Ye answer toh mene kal he google me padha tha....
-14:29 why danger signals..... Red in colour?
Good question and answer
Where's presbyopia? And those topics like cataract..sir please explain them also
Bhai 2024 -2025 batch vale like Karo ❤.
Attendance here 🙋🙋
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Present 😅
Yess I 'am 😊
2024 25 students attentions here 😂 guys do your best for your parents and also for teachers!! Never ever break their trust 🌼✨👍this is best exam of my life in 2025🎉🌟🌟
Tusharika Patel 2024-2025
54:47
Okay I will do 😊
Jo jo bhi ye video dekh ke thorda bhi samje wo like maro
Aur 10 mai sab sab all the students of 10 class will pass 😊😊
{ Those who like this comment will pass in 10 class ❤
Q . Why do sun appear more reddish during sunrise and sunset?
Ans : Red and yellow light from the sun cannot be scattered by the tiny atmospheric particles. When sunlight passes over a greater distance, the blue light scatters more due to short wavelength . As a result, yellow ànd red light appears during sunrise and sunset as they longer wavelength. I hope it helps 😊.
Goggle baba zindabadd😂👽
@@KumkumMishra-eq5bg bro u can see Google u will not get same result cause I wrote this from my brain 🗿
@@Amiyamanoban-xz3gq sigma girls😌🙏🏻
👍
Hi
When a white light (from sun) enters the earth's atmosphere, it gets scattered away due to the atmospheric particles. Since, blue colour has the minimum wavelength, so blue colour scatters the most and thus the sky appears blue
Q. Why bus yellow colour to school bus ?
ANS. The use of yellow for school buses is primarily for safety reason.. yellow is highly visible, especially in the early morning or late afternoon when children are travelling to and from school. It help other drivers quickly identify the bus and take caution . 😊
Sir you are the best teacher in the world 🌎 and I wish you live happily in your whole life 😊
Bcz you deserve this ❤
33:44 Bhaiyya, Me toh Padhne aya tha 😅🥲
😂
56:01 Ans-Red light scatters the least by the molecules present in the air. So at sunrise and sunset, the sunlight travels a longer path through the atmosphere to reach our eyes. The blue light scatters the most and has been mostly removed, leaving the red light remaining which reaches our eyes, hence it appears red. PIN TO BANTA HAI 😍😍
Sahi hai main ne bhi yahi kara hai
👍👍👍👍
Ni bnta hai
5:06 human eye
5:22 part of human eye
16:48 far and near point of eye
19:07 Power of accomodation
22:28 to see far and near object
25:05 myopia
29:21 hypermetropia
32:04 advantages of eye infront of the face
33:11 prism
34:28 dispersion of light
35:45 total internal reflection
41:57 rainbow formation
49:58 why so sky appears blue?
55:05 why do sun appear more reddish during sunrise and sunset
56:39 why danger signals are usually represented by red colour
57:36 why yellow colour to school bus
57:49 why do celestial body appears slightly raised from the position?
59:51 what is the reason behind 2 minutes early sunrise and 2 minutes delayed sunset
1:02:48 why do Star twinkle but planets do not?
1:05:45 why do sun appear more reddish during sunrise and sunset
Thanks 👍🏻
Thank you very much so much
43:41 it's not TIR but the phenomena of IR happening here..
The white light coming from sun passes through thick layers of air and covers a larger distance in the earth's atmosphere before reaching to the observer. During this more scattering of blue light and shorter wavelengths take place . Hence, the red light reaches to the observer and sky appears reddish.
55:48 because R,O,Y have high wavelength and more pressure on atmospheric particles
toh ye sirf morning mein hi kyun 🤔
As our eyes are mostly sensitive to yellow colour. So, school buses can be easily spotted by other drivers around and a safe distance can be maintained to ensure safety of childern.
Thanks
not yellow its red
@@pranav.1697ganja addict spoored bosrds me fsil huya hoga ik
Thank you so much Bhaiya for this beautiful and wonderful explanation ❤❤❤❤
I trust you Bhaiya so these why I got 40 out of 35 in my exam ❤❤
❤❤
Anyone watching in sept. 2024?
Me!! 😂
Me 😂
Me😂
Me also 😂 because I have monthly test of this chapter on tomorrow 😂
Yes❤
Prasant bhaiya be like: Toh human eye kya hota hai..human eye kch nai hota 😂😂😂most epic🤣❤️
Advanced sunrise and delayed sunset are phenomena caused due to atmospheric refraction. In this the Sun appears to rise early by 2 minutes and set late by 2 minutes. When the rays from the Sun hit the atmosphere they get refracted. 1:00:03
56:00 During sunset and sunrise, sunlight travels through more of the atmosphere, which scatters away the shorter wavelengths of light, leaving mostly red light to reach our eyes:
Explanation
Light wavelengths
Sunlight is made up of seven colors, with red having the longest wavelength and violet having the shortest.
Atmospheric particles
When the sun is close to the horizon, its light must travel through more of the atmosphere to reach our eyes.
Light scattering
Atmospheric particles scatter light, and shorter wavelengths like blue are scattered more than longer wavelengths like red.
Red light remaining
Because blue light is scattered away, mostly red light remains to reach our eyes, making the sun appear red.
44:37 Total internal reflection does not play a role in the formation of a rainbow. Instead, the formation of a rainbow involves a combination of refraction, dispersion, and reflection.
Right aur vase hi total internal refraction is not in our book
@@Noobnotfound.....999 yess
Yaar vo 12 ke physics ke teacher hai or jaruri nhi hai ki jo book me n ho to vo hi na aur unhone bola bhi tha ki aage padenge jab agar science lenge
@@allinonecreativitybyvanshi95bt aisa nhi h ki 12 me jakr TIR padinge rainbow formation me, that was actually wrong tbhi maine ye point mention kiya
Bhai batch me to ir likhaya hai bhaiya ne
Sun appears reddish during sunrise or sunset due to the scattering of light . Actually at the time of sunrise and sunset the sun is far away from us then the light from the sun have travel more distance and since more distance travelling therefore more scattering of light. Hence colour of sun is reddish during sunrise and sunset 55:06
You know that this part is deleated....
Ques:- why do sun appears more reddish during sunrise and sunset?
Ans:- The reason why the Sun appears reddish during sunrise and sunset is because of the scattering of light in the Earth's atmosphere. The atmosphere of Earth contains, oxygen, carbon dioxide etc.,when the sunlight first and last reaches Earth, it posses through these molecules. They absorb different wavelengths, but the most scattered wavelength is blue because of its shorter wavelength (~450nm).
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Why do sun appear more reddish during sunrise and sunset?
Ans=
The sun appears more reddish during sunrise and sunset due to the phenomenon known as Rayleigh scattering. As the sun is low on the horizon, its light has to pass through a larger portion of the Earth's atmosphere compared to when it's overhead. This longer path length scatters shorter wavelengths of light (blue and violet) more than longer wavelengths (red and orange). As a result, the light that reaches our eyes directly is more dominated by these longer wavelengths, giving the sun a reddish or orange hue.
Where are you from ??
Bhai topic deleted h ye 2024-25 me
Since the color red has the highest wavelength of all colours it gets scattered the least. So red light is used as a danger signal as it is able to travel the longest distance through the fog, rain, etc.
Hiii
57:00 Red= Colour ❌ Red= Sakt launda 😂 ✅
Sir booklet website shows an error..this website is not open..but whyy?
Bhaiya aapne presbyopia to padhaya hi nhi
24:49 par bhaiya se mistake hoo gai hai
Sab log sahi krke likh lena
Bhaiya ne galti se contracted muscles ki Jagah relaxed likh dia or relaxed muscles jagah contracted muscles
I hope it helps 😁
Bhaiya ek doubt hai!!!
Ye rainbow curved kyu hota hai??☠️☠️☠️
Itni aasaan chij nahi pata chiiiii
Mujhe bhi nahi pata🎉
I wish mera comments jo bhi log padh rhe h wo log board me 98% score kare🙏🏻
31:32 bhaiya prebyopia skip kr diya? 😅
😂
Anyone watching in October.2024 ?😮
Me😂
Me also 😂
Me 😮
Bhai me to aak dekh rha..
Kee halal ha 😂
Just came 2 days before the exams..😅
The bestest teacher 🥰💗
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School buses are painted yellow because of the following reasons:
•Visibility: Yellow is one of the most visible colors to the human eye, and people can see it better than red in their peripheral vision.
•Low light: Yellow is easier to see in low light than red.
21:19 definition of power of accomodation in more easy words:- ( it's the ability of ciliary muscle to adjust focal length of the eye lens to form clear and complete image of various objects ) is it helpful 😅
ncert me yahi given hai😅
Hnn shyd inhe ye easy lga ho🤧😅
@@seeratsharma3892Ye nahi h same alag h thodi bohot but yesi hi h
As red light is least scattered by the particles and when the sun rises, the first light in VIBGYOR is RED and hence it reaches our eyes directly. Then the light changes to ORANGE and then YELLOW. The same phenomena in reverse occurs while the sun is going to set.
Q.why bus yellow colour to school bus?
Ans-The use of yellow for school buses is primarily for safety reasons. Yellow is highly visible, especially in the early morning or late afternoon when children are traveling to and from school. It helps other drivers quickly identify the bus and take caution.❤❤
Why yellow colour is visible hight why red not
due to atmospheric refraction
S😊
You make the world a better place every day. Happy Birthday!
Happy birthday Prashant bhaiya
😄
57:34 why yellow colour to school bus?
Ans- yellow colour can also be spotted even in the rain, fog and dew. Since the lateral peripheral vision of yellow is 1.24 times greater than the red colour, it is more visible than the red itself.
Kabhi kabhi to aisa lagta hai ki aap hi bhagwan ho 🥲
Thanks bhaiya❤❤
Any one in November 😂
Late backbenchers 😂
Present 😅
Yes yes 😂
Present
present sir
PRESENT BRO
Blue eyes hypnotize teri kardi a menu yeh hai ap glt padrahy ho baiyaa😂❤❤
Q.why do sun appear more reddish during sunrise and sunset?
Ans..At the time of sunrise or sunset the position of the sun is very far away from us. The sunlight travels longer distance through the atmosphere of the earth before reaching our eyes scattering of blue light is more than the scattering of red light. As a result of this more red lights reaches our eyes than any other colour hence sunset and sunrise appears red
Bro I didn't understand
R u from VTCS school..?